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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 9, Number 4
JKCSEZ 9(4)
August 20, 1965 

 
Title
Adsorption Mechanism of Solid Acid in Nonaqueous Solution

고체산의 비수용액에서의 흡착메카니즘에 관한 연구
Author
Oh Cheun Kwun

권오천
Keywords
Abstract
한국산 산성백토류 및 silica gel을 aniline yellow, o-nitro aniline, oil orange 색소 benzene 용액과 작용시켜 비수용액에서이 색소흡착률을 측정하였다. 그 흡착률은 silica gel이 산성백토류보다 컸으며 산성도에는 무관하였다. 또 상기 색소용액에 각 10%의 첨가용제 amine, alcohol, halogen류 화합물등을 가하여 고체산의 색소흡착률의 변화(흡착조해률)에 대하여 조사한 결과 위에 적은 순으로 그 영향이 적어지고, 동족체에서는 분자량이 적을 수록 그 영향이 커짐을 알았다. 따라서비수용액에서의 흡착은 amine기, 수산기등과 같은 음성기를 갖는 화합물은 선택흡착하고 계면장력에 무관계하여 Traulbe계열의 역전현상을 나타내었다. 그 역전현상(흡착조해현상)은 그 순위가 첨가용제의 쌍극자능률과 대체적으로 일치하는 것으로 보아 고체산모체인 활성규산과 피흡착체사이의 극성적화학흡착에 의한 것이라 추정된다. 본실험결과로부터 고체산의 비수용액에서의 흡착메카니즘, Traube 계열의 역전현상에 관하여 고찰하게 되었다.

Korean acid clays and silica gel were put into action on benzene solution of dye, such as aniline yellow, o-nitro aniline and oil orange, and then the adsorptivity of dye in nonaqueous solution was measured, with the result that adsorptivity was greater with silica than acid clays and it had no relation to acidity. And when chemical compounds, such as amine, alcohol, halogen derivative, were added to each dye solution by 10%(in volume), the change of the adsorptivity of dye by solid acid(that is, the interfered adsorption rate) decreased in order of amine > alcohol > halogen derivative, and in homologue the smaller the molecular weight, the larger was the effect. So adsorption in nonaqueous solution was a selective adsorption of chemical compounds which contained negative groups such as amine and hydroxyl radicals, and it had no relation to surface tension and showed inverted phenomenon of Traube series. It is guessed that the inverted phenomenon (the interfered adsorption phenomenon) was due to the polar chemical adsorption between active SiO2 which was an origin of solid acid and the adsorbed substances, considering that the order of inversion was nearly in accord with dipole moment of added solvents. The results of this study led to find adsorption mechanism and inverted phenomenon of Traube series in nonaqueous solution.

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